Earthquake 20170928-15

2017-09-28 23:11:17.920 474.4 km 5.5 mb
24.8849°S, 179.9204°W
South Pacfic Ocean
635 km SW of Nuku?alofa, Tonga
Time Error: 1.77 s Depth Error: 12.0 km
Num. Stations: 32 Time RMS: 0.87 s
Num. Phases: 35 Azimuth Gap: 97°
Analysis Type: Manual Max. Intensity (MMI):
Effects Type: Seismic
 

MANUALLY REVIEWED LOCATION

Magnitudes

Preferred Magnitude Stations Error Author Action
Emblem-favorite 5.5 mb 5 0.30 NCMS System-search
6.4 ML 2 0.30 NCMS System-search
5.5 M 7 0.30 NCMS System-search
6.1 mB_BB 2 0.40 NCMS System-search
5.5 mb 0 0 NCMS System-search
5.5 M 0 0 NCMS System-search

Origin Details

Ellipse Major:17.30 km Min. Distance:4.69° Fixed Depth:no
Ellipse Minor:9.90 km Max. Distance:155.71° Fixed Phase:no
Ellipse Strike:95.0° Fixed Location:no Fixed Time:no
Author:NCMS Location Method:Inversion Event Type:Suspected Earthquake
External Event ID:HYDRA_RED@18767 External Origin ID:HYDRA_RED@37519

Error Ellipse

Azimuth Dip Magnitude Action
Max 95° 40.7 km System-search
Intermediate 185° 23.1 km System-search
Min 276° 85° 17.9 km System-search

None

Channel Time Amplitude Period/Duration Magnitude Event Distance Event Azimuth Action
IU.RAO.00.BH2 2017-09-28 23:13:57.190 1e+04 0.82 s 6.5 ML 4.69° 158.2° System-search
IU.TARA.00.BHZ 2017-09-28 23:16:20.940 7e+03 0.85 s 6.3 mB_BB 26.99° 344.1° System-search
IU.TARA.00.BHZ 2017-09-28 23:16:21.464 715.7 0.90 s 6.2 mb 26.99° 344.1° System-search
IU.POHA.00.BHZ 2017-09-28 23:19:31.359 190.9 1.00 s 5.4 mb 50.32° 30.4° System-search
IU.COR.00.BHZ 2017-09-28 23:23:10.910 416.9 1.90 s 5.8 mb 86.31° 36.8° System-search
GT.PLCA.00.BHZ 2017-09-28 23:23:16.819 58.9 1.40 s 5.2 mb 87.53° 134.2° System-search
IU.COLA.00.BHZ 2017-09-28 23:23:38.579 16.4 1.05 s 5.0 mb 92.85° 13.2° System-search
GT.PLCA.00.BHZ 2017-09-28 23:25:31.944 1e+03 6.10 s 5.8 mB_BB 87.53° 134.2° System-search
Channel Phase Time Time Residual Dir. Event Distance Event Azimuth Automatic? Defined By Action
IU.RAO.00.BHZ P 2017-09-28 23:12:39.890 -0.90 s 4.69° 158.2° yes Time System-search
II.MSVF.00.BHZ P 2017-09-28 23:13:07.960 1.00 s 7.35° 344.7° yes Time System-search
IU.TARA.00.BHZ P 2017-09-28 23:16:20.640 0 s 26.99° 344.1° yes Time System-search
IU.POHA.00.BHZ P 2017-09-28 23:19:30.609 0.20 s 50.32° 30.4° yes Time System-search
IU.MIDW.00.BHZ P 2017-09-28 23:19:48.089 -0.20 s 52.85° 2.8° no Time System-search
IU.COR.00.BHZ P 2017-09-28 23:23:09.809 1.20 s 86.31° 36.8° yes Time System-search
GT.PLCA.00.BHZ P 2017-09-28 23:23:15.519 0.70 s 87.53° 134.2° yes Time System-search
IU.COLA.00.BHZ P 2017-09-28 23:23:37.680 -0.80 s 92.85° 13.2° no Time System-search
II.KURK.00.BHZ PKPdf 2017-09-28 23:29:03.960 -1.90 s 115.96° 316.0° yes Time System-search
IU.KBL.--.BHZ PKPdf 2017-09-28 23:29:15.319 0.20 s 120.35° 296.5° yes Time System-search
II.BRVK.00.BHZ PKPdf 2017-09-28 23:29:15.559 -0.50 s 121.29° 318.2° yes Time System-search
OM.BID.--.HHZ PKPdf 2017-09-28 23:29:28.200 -0.40 s 127.39° 281.1° no Time System-search
OM.SOH.--.HHZ PKPdf 2017-09-28 23:29:30.720 -0.90 s 128.95° 281.4° no Time System-search
II.UOSS.10.BHZ PKPpre 2017-09-28 23:29:31.069 8.70 s 129.43° 282.3° no System-search
II.UOSS.10.BHZ PKPdf 2017-09-28 23:29:31.890 -0.60 s 129.43° 282.3° yes Time System-search
DN.HAT.--.HHZ PKPpre 2017-09-28 23:29:31.970 9.50 s 129.46° 282.2° no System-search
OM.ASH.--.HHZ PKPdf 2017-09-28 23:29:32.109 -0.60 s 129.50° 282.0° no Time System-search
DN.HAT.--.HHZ PKPdf 2017-09-28 23:29:32.400 -0.20 s 129.46° 282.2° yes Time System-search
AE.ALN.--.HHZ PKPdf 2017-09-28 23:29:32.960 0.10 s 129.63° 281.1° yes Time System-search
AE.MSF.--.HHZ PKPdf 2017-09-28 23:29:33.500 0.70 s 129.56° 282.9° yes Time System-search
AE.SHM.--.HHZ PKPdf 2017-09-28 23:29:33.789 0.60 s 129.82° 283.8° yes Time System-search
DN.ASU.--.HHZ PKPdf 2017-09-28 23:29:34.079 0.30 s 130.13° 281.7° yes Time System-search
DN.NAZ.--.HHZ PKPdf 2017-09-28 23:29:34.210 0.80 s 129.92° 282.3° no Time System-search
IU.LSZ.00.BHZ PKPdf 2017-09-28 23:29:36.410 -0.60 s 131.57° 217.2° yes Time System-search
IU.KEV.00.BHZ PKPdf 2017-09-28 23:29:36.410 -0.30 s 132.39° 347.6° yes Time System-search
AE.MZR.--.HHZ PKPdf 2017-09-28 23:29:37.049 0.80 s 131.42° 279.1° yes Time System-search
IU.TSUM.10.BHZ PKPdf 2017-09-28 23:29:40.210 0.60 s 132.98° 202.7° yes Time System-search
BH.SAK.--.HHZ PKPdf 2017-09-28 23:29:43.579 1.30 s 134.65° 282.3° yes Time System-search
II.OBN.00.BHZ PKPpre 2017-09-28 23:29:45.359 1.80 s 139.64° 327.9° yes System-search
IU.KMBO.00.BHZ PKPdf 2017-09-28 23:29:45.910 1.00 s 135.67° 239.5° yes Time System-search
IU.GNI.00.BHZ PKPdf 2017-09-28 23:29:52.910 1.30 s 139.81° 303.1° yes Time System-search
GE.EIL.--.BHZ PKPdf 2017-09-28 23:30:06.740 -0.30 s 148.72° 286.1° yes Time System-search
IU.ANTO.00.BHZ PKPdf 2017-09-28 23:30:07.109 0.20 s 148.79° 306.2° yes Time System-search
GE.EIL.--.BHZ PKPbc 2017-09-28 23:30:11.440 0 s 148.72° 286.1° yes Time System-search
II.ESK.00.BHZ PKPbc 2017-09-28 23:30:12.059 -0.50 s 149.51° 3.7° yes Time System-search
II.BFO.00.BHZ PKPdf 2017-09-28 23:30:15.859 -0.90 s 155.71° 346.4° yes Time System-search
II.BFO.00.BHZ PKPdif 2017-09-28 23:30:26.309 -0.10 s 155.71° 346.4° yes Time System-search
II.BFO.00.BHZ PKPab 2017-09-28 23:30:46.160 0.20 s 155.71° 346.4° yes Time System-search

Shake Maps

None

Ground Motion

None

Event 20170928-15

Time: 2017-09-28 23:11:17.920
Position:24.8849°S, 179.9204°W
Place:South Pacfic Ocean
Major Place:635 km SW of Nuku?alofa, Tonga
Depth:474.4 km
Magnitude:5.5 mb